Well-drilling machine



(No Model.) I

D. J. (JULY.

WELL DRILLING MACHINE.

292. Pat ented Dec. 6, 1887.

UNITED STATES PATENT OFFICE.

DAVID J. CULY, OF FELTON, MINNESOTA.

WELL-DRILLING MACHINE.

SPECIFICATION forming part of Letters Patent No. 374,292, dated December6, 1887.

Application filed April 26, 1887. Serial No. 238,266. (No model.)

To ail whom it may concern:

Be it known that I, DAVID J. GULY, a citizen of the United States,residing at Felton, in the county of Clay and State of Minnesota, haveinvented a new and useful Improvement in VVell-Drilling Machines, ofwhich the following is a specification.

My invention relates to a class of machines used for boring holes inrock by means of a metal drill operated by a rope; and the object of myimprovement is to provide a simple, durable, and easy-working method ofraising and dropping the drill and cushioning the shock of fall andrebound. I attain these obr5 jects by the mechanism illustrated in theaccompanying drawings, in which- Figure 1 is a perspective view, andFig. 2 a sectional side view, of moving parts.

Similar letters refer to similar parts throughout.

In the drawings the frame represented in Fig. 1 is placed by the side ofand against the derrick over the well-hole. The rope A, Fig. 1, extendsupward overa pulley in the derrick and down to the drilling tools. Thisrope passes around a pulley, B, and thence to a drum, 0, Fig. l, onwhich the surplus rope is wound, and from which it is unwound as thedrilling progresses. The pulley B is set in a block or frame, D,supported by cranks E E, swinging in hearings in frame at F F.

The surfaces K K of the frame D constitute tracks upon which thetrundles I I engage during the operation of the machine. On the sameframe, but in front and above the bearings F F, I put a shaft, G,extending across the frame in line parallel with bearings F F. To this Ishaft is attached a collar having two projecting arms, H H, Fig. 1.

In the end of each of these arms I put a trundle, I I, Fig. 1. These 40A tends to hold the pulley B and block D up. 5

Then the arms come around, the trundles I I strike the tracks KK andswing the pulleyand block downward and forward, the cranks E E turningin their bearings at F F, thus depressing'the rope and raising the drilluntil the trundles run off the tracks K K, when they are releasedjandthe drill falls. The arms H H and the cranks E E are of nearly the samelength. Their length and the distance between the bearings are such thatthe tracks KK are opposite the pulley B. \Vhen the drill drops, itimparts a momentum to the pulley and block, which is arrested by theelasticity of the rope, thus cushioning the shock of the fall of thedrill and catching it as it rebounds.

hat I claim as my invention, and desire to secure by Letters Patent, is-

l. The combination,with the pulley, pulleyblock, and its cranks, of theshaft carrying arms to depress them, substantially as and for thepurposes herein specified.

2. The combination, with the pnlley-block having tracks on its sides, ofthe arms provided with trundles, substantially as and for the purposesherein specified.

DAVID J. GULY.

Witnesses:

E. M. BRADFORD, W. WV. WATERBURY.

